NewShengQian/YouHuiProject/YouHui/Category/UIView+YHExt...

//
//  UIView+YHExtend.m
//  YouHuiProject
//
//  Created by jcymac on 2018/5/19.
//  Copyright © 2018年 kuxuan. All rights reserved.
//

#import "UIView+YHExtend.h"

@implementation UIView (YHExtend)


-(UIImage *)changeToImage{
//    UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 1.0);  //NO，YES 控制是否透明
//
//    [self.layer renderInContext:UIGraphicsGetCurrentContext()];
//
//    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
//
//    CGRect myImageRect = self.bounds;
//
//    CGImageRef imageRef = image.CGImage;
//
//    CGImageRef subImageRef = CGImageCreateWithImageInRect(imageRef,myImageRect );
//
//
//
//    CGContextRef context = UIGraphicsGetCurrentContext();
//
//    CGContextDrawImage(context, myImageRect, subImageRef);
//
//    UIImage* smallImage = [UIImage imageWithCGImage:subImageRef];
//
//    CGImageRelease(subImageRef);
//
//    UIGraphicsEndImageContext();
//    return smallImage;
    CGSize s = self.bounds.size;
    // 下面方法，第一个参数表示区域大小。第二个参数表示是否是非透明的。如果需要显示半透明效果，需要传NO，否则传YES。第三个参数就是屏幕密度了
//    UIGraphicsBeginImageContextWithOptions(s, NO, [UIScreen mainScreen].scale);
    UIGraphicsBeginImageContextWithOptions(s, NO, 0);
    [self.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage*image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

@end